I would be happy to incorporate your personal service plan into your business.
Nursing would be my answer
Stubborness or inflexibility would be appropriate synonyms for 'obstincy' as it is used in this excerpt.
Obstinacy in defence means that they are stubborn in defence - and are going to stick with it, no matter what other information comes to light.
If you to page 247 on a book from currius elm school you can find what your looking for.
Either a or b. I don't know the story though but good luck.
